Power of Lens
Power of a lens is a measure of its ability to bend light rays. It is measured in diopters. The formula states that the power of a lens is inversely proportional to its focal length.
P = 1/f
where
- P represents the power of the lens, measured in units of diopters (D).
- f represents the focal length of the lens, measured in units of meters (m).
The SI unit of the power of the lens is m-1 or diopter.
Ray Optics – Definition, Formula, Applications
Ray Optics is the study of properties of light and optical instruments by assuming that light travels in a straight line. It is also known as geometrical optics, which deals with the geometry of light. Light always travels in a straight line, and the direction in which the light rays propagate is called the ray of light. It studies the principles and laws governing the propagation of light, particularly in the absence of wave effects such as interference and diffraction.
In this article, we will learn about ray optics, reflection, refraction, concave and convex mirrors, lenses, and formulas related to them.